Heat exchanger of ventilating system

ABSTRACT

A heat exchanger of a ventilating system includes: heat exchange plates laminated with regular intervals so that a first air passage through which indoor air being discharged to outside of a building passes and a second air passage through which outdoor air being introduced into the interior of the building passes are sequentially formed; first corrugation plates attached to the first air passage and obtaining a space to allow outdoor air to pass therethrough; and second corrugation plates attached to the second air passage and obtaining a space to allow outdoor air to passtherethrough, wherein the heat exchange plates are made of a paper material with numerous fine holes that are able to generate a capillary phenomenon. A sensible heat exchange and a latent heat exchange are possible to minimize a change in a temperature and moisture.

TECHNICAL FIELD

The present invention relates to a heat exchanger for exchanging indoorair and outdoor air and, more particularly, to a heat exchanger of aventilating system that is capable of exchanging sensible heat andlatent heat between indoor air and outdoor air.

BACKGROUND ART

In general, a ventilating system is a device intended for dischargingfoul indoor air to outside a building and sucking outdoor fresh air intothe interior of the building, which includes an air cleaner for removingdusts and foreign materials contained in indoor air and a heat exchangerfor transferring heat of indoor air being discharged to outdoor airbeing sucked.

FIG. 1 is a perspective view of a general ventilating system.

As illustrated, the ventilating system includes a case 2 mounted in awall of a building which sections an outdoor side and an indoor side;blast fans 4 and 6 inserted in the case 2 and performing a ventilatingoperation on air being sucked and discharged, an air cleaner (not shown)installed at a portion in the case where outdoor air is sucked andcleaning outdoor air being sucked, and a heat exchanger 8 disposedinside the case 2 and performing heat exchanging between indoor airbeing discharged and outdoor air being sucked.

The case 2 is mounted penetrating the wall sectioning the indoor sideand the outdoor side. Thus, one side of the case is positioned at theinterior of the building while the other side is positioned at theexterior of the building. An outdoor suction opening 10 through whichoutdoor air is sucked and an outdoor discharge opening 12 through whichindoor air is discharged are formed at the outdoor side of the case 2.An indoor discharge opening 14 through which outdoor air is supplied andan indoor suction opening 16 through which indoor air is sucked areformed at the indoor side of the case 2.

The discharging blast fans 4 is installed at one side of the outdoordischarge opening 12 and provides a blast pressure to discharge indoorair to the exterior of the building, and the sucking blast fan 6 isinstalled at one side of the indoor discharge opening 14 and provides ablast pressure to suck outdoor air to the interior of the building.

FIG. 2 is a perspective view of a heat exchanger for a ventilatingsystem in accordance with a conventional art, and FIG. 3 is a partialperspective view of the heat exchanger.

A heat exchanger 8 in accordance with the conventional art includes:heat exchange plates 20 laminated with regular intervals so that a firstair passage 26 through which indoor air passes and a second air passage28 through which outdoor air passes are sequentially formed; firstcorrugation plates 22 attached to the first air passages 26 between theheat exchange plates 20 and obtaining a space for allowing indoor air topass through; and second corrugation plates 24 attached to the secondair passage 28 between the heat exchange plates 20 and obtaining a spaceto allow outdoor air to pass through.

The heat exchange plates 20 are formed in a flat type, made of analuminum material and carries out a heat exchanging operation betweenindoor air flowing through the first air passage 26 and outdoor airflowing through the second air passage 28.

The first and second corrugation plates 22 and 24 are made of the samealuminum material as that of the heat exchange plates 20, and bentseveral times in a triangular form to obtain the space through whichindoor air and outdoor air can pass.

With such a structure, the heat exchanger 8 is constructed overall in arectangular form as the first corrugation plates 22, the heat exchangeplates 20 and the second corrugation plates 24 are sequentiallylaminated.

When outdoor air passes through the first corrugation plates 22 andindoor air passes through the second corrugation plates, that is, whichpass in a crossing manner, heat exchanging is carried out that heat ofindoor air is transferred to outdoor air through the heat exchangeplates 20.

The operation of the heat exchanger for a ventilating system constructedas described above in accordance with the conventional art will now beexplained.

When the discharging blast fan 4 is driven, indoor air is sucked intothe indoor suction opening 16, passes the first air passage 26 and isdischarged to the outside through the outdoor discharge opening 12.

And when the sucking blast fan 6 is driven, outdoor air is sucked intothe outdoor suction opening 10, passes the second air passage 28 and issupplied to the interior of the building through the indoor dischargeopening 14.

At this time, as indoor air passing through the first air passages 26and outdoor air passing through the second air passages 28 flow crossingeach other, heat of indoor air is transferred to outdoor air through theheat exchange plates 20 and outdoor air which has absorbed the heat ofindoor air is supplied to the interior of the building.

In this manner, the outdoor air being sucked absorbs heat contained inindoor air being discharged and is discharged to the interior of thebuilding, so that a rapid change in an indoor temperature is preventedin a ventilating operation.

However, the heat exchanger of a ventilating system of the conventionalart has the following problem.

That is, since the heat exchanging plate 20, the first corrugation plate22 and the second corrugation plate 24 are made of the aluminummaterial, heat transfer is possibly performed that heat of indoor air istransferred to outdoor air in terms of the properties of the aluminummaterial. At this time, however, since moisture contained in the indoorair fails to be transferred to the outdoor air, although the change inthe indoor temperature can be reduced after the ventilating operation, ahumidity changes.

DISCLOSURE OF THE INVENTION

Therefore, it is an object of the present invention to provide a heatexchanger of a ventilating system that is capable of performing a latentheat exchange that outdoor air absorbs moisture contained in indoor airas well as performing a sensible heat exchange that heat contained inindoor air being discharged to outside a building is transferred tooutdoor air being introduced to the interior of the building, therebyminimizing a change in an indoor temperature and humidity during aventilating operation.

To achieve the object, there is provided a heat exchanger of aventilating system including: heat exchange plates laminated withregular intervals so that a first air passage through which indoor airbeing discharged to outside of a building passes and a second airpassage through which outdoor air being introduced into the interior ofthe building passes are sequentially formed; first corrugation platesattached to the first air passage and obtaining a space to allow outdoorair to pass therethrough; and second corrugation plates attached to thesecond air passage and obtaining a space to allow outdoor air to passtherethrough, wherein the heat exchange plates are made of a papermaterial with numerous fine holes that are able to generate a capillaryphenomenon.

In the heat exchanger of a ventilating system in accordance with thepresent invention, the heat exchange plates are made of a Korean paperwith a high fiber strength and numerous fine holes that are able togenerate a capillary phenomenon.

In the heat exchanger of a ventilating system in accordance with thepresent invention, the heat exchange plates contains 60˜70%, of holocellulose, 10˜20% of lignin and 5˜10% of lime.

In the heat exchanger of a ventilating system in accordance with thepresent invention, the Korean paper constituting the heat exchangeplates is fabricated with bast fiber of the paper mulberry as a keycomponent.

In the heat exchanger of a ventilating system in accordance with thepresent invention, a process for fabricating the heat exchanging platewith the Korean paper includes the steps of: bundling the papermulberry, putting it in a container with water, boiling it to a degreethat its skin is easily peeled off, peeling and drying them; soaking thedried skin of the paper mulberry in the water, sorting out only the bastfiber portion, putting the bast fiber portion in caustic soda andboiling it more than three hours, and wringing it with a compressor;putting the moisture-removed bast fiber in a liquid which has beenprepared by mashing roots of the paper mulberry and pressing them out,and mixing them evenly, and filtering the resulting paper solution byusing a sieve.

To achieve the above object, there is also provided a heat exchanger ofa ventilating system including: heat exchange plates laminated withregular intervals so that a first air passage through which indoor airbeing discharged to outside of a building passes and a second airpassage through which outdoor air being introduced into the interior ofthe building passes are sequentially formed; first corrugation platesattached to the first air passage and obtaining a space to allow outdoorair to pass therethrough; and second corrugation plates attached to thesecond air passage and obtaining a space to allow outdoor air to passtherethrough, wherein the heat exchange plates, the first corrugationplates and the second corrugation plates are made of a paper materialwhich is able to generate a capillary phenomenon.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partially cut perspective view showing the construction of ageneral ventilating system;

FIG. 2 is a perspective view of a heat exchanger of a ventilating systemin accordance with a conventional art;

FIG. 3 is a partial perspective view of the heat exchanger of aventilating system in accordance with the conventional art;

FIG. 4 is a perspective view of a heat exchanger of a ventilating systemin accordance with one embodiment of the present invention;

FIG. 5 is an exploded perspective view of the heat exchanger of aventilating system in accordance with one embodiment of the presentinvention; and

FIG. 6 is an exploded perspective view of the heat exchanger of aventilating system in accordance with another embodiment of the presentinvention.

MODES FOR CARRYING OUT THE PREFERRED EMBODIMENTS

A heat exchanger of a ventilating system in accordance with preferredembodiments of the present invention will now be described withreference to the accompanying drawings.

There can be several embodiments of the heat exchanger of a ventilatingsystem in accordance with the present invention, of which preferred oneswill be described.

FIG. 4 is a perspective view of a heat exchanger of a ventilating systemin accordance with one embodiment of the present invention.

With reference back to FIG. 1, a ventilating system of the presentinvention includes a case 2 mounted penetratingly in a wall of abuilding that sections an outdoor side and an indoor side of thebuilding. That is, one side of the case 2 is positioned at the exteriorof the building while the other side of the case 2 is positioned at theinterior of the building.

The outdoor suction opening 10 through which outdoor air is sucked andan outdoor discharge opening 12 through which indoor air is dischargedare respectively connected at the outdoor side of the case 2, while anindoor suction opening 14 through which indoor air is sucked and anindoor discharge opening 16 through which outdoor air is supplied to theinterior of the building are connected at the indoor side of the case 2.

A discharging blast fan 4 is installed to at one side of the outdoordischarge opening 12 to generate a blast force to discharge indoor airto the exterior of the building, and a sucking blast fan 6 is installedat one side of the indoor discharge opening 14 to generate a blast forceto suck outdoor air to the interior of the building.

An air cleaner (not shown) is installed on a suction passage inside thecase 2 to remove various impurities and dusts contained in outdoor airbeing sucked to the interior of the building, and a heat exchanger 8 isinstalled inside the case 2 to carry out a heat exchanging operationbetween indoor air being discharge to the exterior of the building andoutdoor air being sucked to the interior of the building.

As shown in FIG. 4, the heat exchanger 8 includes heat exchange plates54 laminated with predetermined intervals so that a first air passage 50through which indoor air passes and a second air passage 52 throughwhich outdoor air passes are sequentially formed; a first corrugationplate 56 attached on the first air passage 50 to obtain a space throughwhich the indoor air passes; and a second corrugation plate 58 attachedon the second air passage 52 to obtain a space through which the outdoorair passes.

The heat exchanger 8 has a rectangular form in an overall shape, and thefirst corrugation plate 56 and the second corrugation plate 58 arearranged to be crossed, so that indoor air and outdoor air flow in thecrossing manner, during which heat exchange is carried out through theheat exchange plates 54.

The heat exchange plate 54 has a thin flat type and is made of amaterial which is able to pass moisture therethrough so that moisturecontained in the indoor air flowing in the first air passage 50 can betransferred to outdoor air flowing in the second air passage 52.

In other words, as shown in FIG. 5, the heat exchange plate is made of apaper material with an excellent moisture absorption rate. Preferably,the heat exchange plate 54 is made of a Korean paper with numerous fineholes that is able to generate a capillary phenomenon.

The Korean paper is fabricated by a Korean particular method, of whichmain ingredient is the bast fiber of paper mulberry.

The fabrication process of the Korean paper includes the steps of:bundling the paper mulberry, putting it in a container with water,boiling it to a degree that its skin is easily peeled off, peeling anddrying them; soaking the dried skin of the paper mulberry in the water,sorting out only the bast fiber portion, putting the bast fiber portionin caustic soda and boiling it more than three hours, and wringing itwith a compressor; putting the moisture-removed bast fiber in a liquidwhich has been prepared by mashing roots of the paper mulberry andpressing them out, and mixing them evenly, and filtering the resultingpaper solution by using a sieve.

The Korean paper completed by the fabrication process contains 60˜70% ofholo cellulose, 10˜20% of lignin and 5˜10% of lime. More specifically,it is preferred that the Korean paper comprises 67.5% of holo cellulose,14.7% of lignin and 6.22% of lime.

Referring to the Korean paper, since its fibers are long in length,narrower in width, fibers are combined tightly, and since fibrilsforming the fiber of cellulose are oriented in an axial direction, thefibers have a high strength. Thus, compared to the general paper, theKorean paper has such an advantage that it can be preserved for a longperiod. In addition, the numerous fine holes formed between fibersgenerates the capillary phenomenon, resulting in an excellent moistureabsorption capacity.

Accordingly, fabrication of the heat exchange plate 54 with the Koreanmaterial ensures a latent heat function as moisture contained in indoorair is absorbed to the heat exchange plate 54 which is then transferredto outdoor air.

The operation of the heat exchanger constructed as described above willnow be described.

When the discharging blast fan 4 is driven, indoor air is sucked intothe indoor suction opening 16, passes through the first air passage 50with the first corrugation plate 56 attached thereto and is dischargedthrough the outdoor discharge opening 12 to the exterior of thebuilding.

When the sucking blast fan 6 is driven, outdoor air is sucked into theoutdoor suction opening 10, passes through the second air passage 52with the second corrugation plate 58 attached thereto, and is suppliedto the interior of the building through the indoor discharge opening 14.

As the indoor air passing through the first corrugation plate 56 of thefirst air passage 50 and the outdoor air passing through the secondcorrugation plate 58 of the second air passage 52 flow to cross eachother, heat and moisture of the indoor air is transferred to the outdoorair through the heat exchange plate and the outdoor air which hasabsorbed heat and moisture of the indoor air is supplied to the interiorof the building.

That is, the heat exchange plate 56 is made of the Korean papermaterial, so that a heat transfer performance of transferring heat ofindoor air to outdoor air betters. And thanks to the capillaryphenomenon occurring by the numerous fine holes formed in the heatexchange plate 54, moisture contained in the indoor air is absorbed tothe heat transfer plate 56, which is then transferred to the outdoorair, according to which the outdoor air sucked to the interior of thebuilding contains heat with a temperature as high as the indoor airbeing discharged to outside the building and moisture as much as that ofthe indoor air. Therefore, the temperature and moisture change in theindoor environment can be minimized in the ventilating operation.

FIG. 6 is a perspective view of a heat exchanger in accordance withanother embodiment of the present invention.

Including a heat exchange plate 70, a first, corrugation plate 72 and asecond corrugation plate 74, a heat exchanger in accordance with anotherembodiment has the same structure as that of one embodiment of thepresent invention, except that the heat exchange plate 70, the firstcorrugation plate 72 and the second corrugation plate 74 are fabricatedwith the Korean paper.

That is, the heat exchange plate 70, the first corrugation plate 72 andthe second corrugation plate 74 are fabricated with the Korean paper,through which moisture contained in indoor air can be transferred tooutdoor air, so that heat and moisture transfer performances better.

The construction and fabrication method of the Korean paper are the sameas described in one embodiment of the present invention.

As so far described, the heat exchanger of a ventilating system inaccordance with the present invention has the following advantage.

That is, the heat exchange plate is made of the paper material withnumerous fine holes generating a capillary phenomenon, so that asensible exchange that heat contained in indoor air being dischargedoutside a building is transferred to outdoor air being sucked to theinterior of the building and a latent exchange that moisture containedin indoor air being discharged to outside the building is transferred tooutdoor air being sucked to the interior of the building aresimultaneously performed. Therefore, a change in temperature andmoisture in the exterior of the building can be minimized in aventilating operation.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the heat exchanger of aventilating system of the present invention without departing from thespirit or scope of the invention. Thus, it is intended that the presentinvention cover modifications and variations of this invention providedthey come within the scope of the appended; claims and theirequivalents.

1. A heat exchanger of a ventilating system comprising: heat exchangeplates laminated with regular intervals so that a first air passagethough which indoor air being discharged to outside of a building passesand a second air passage though which outdoor air being introduced intothe interior of the building passes are sequentially formed; firstcorrugation plates attached to the first air passage and obtaining aspace to allow the indoor air to pass therethrough; and secondcorrugation plates attached to the second air passage and obtaining aspace to allow the outdoor air to pass therethrough, wherein the heatexchange plates are made of a paper material with fiber intensity andwith a plurality of fine holes that are able to generate a capillaryaction, moisture of one of the indoor air in the first air passage andthe outdoor air in the second air passage being absorbed by theplurality of fine holes due to the capillary action and being directlytransferred from the plurality of fine holes to the other one of theindoor air in the first air passage and the outdoor air in the secondair passage.
 2. The heat exchanger of claim 1, wherein the heat exchangeplates are made of a Korean paper.
 3. The heat exchanger of claim 2,wherein the heat exchange plates contains 60˜70% of holo cellulose,10˜20% of lignin and 5˜10% of lime.
 4. The heat exchanger of claim 2,wherein the Korean paper constituting the heat exchange plates isfabricated with bast fiber of a paper mulberry as a key component. 5.The heat exchanger of claim 4, wherein a process for fabricating theKorean paper comprising the steps of: bundling the paper mulberry,putting the paper mulberry in a container with water, boiling the papermulberry to a degree that a skin of the paper mulberry is easily peeledoff, peeling and drying the skin; soaking the dried skin of the papermulberry in the water, sorting out only a bast fiber portion of thedried skin, putting the bast fiber portion in caustic soda and boilingthe bast fiber portion more than three hours, and wringing the bastfiber portion with a compressor to obtain a moisture-removed bast fiber;and putting the moisture-removed bast fiber in a liquid that has beenprepared by mashing roots of the paper mulberry and pressing them out,and mixing them evenly, and filtering the resulting paper solution byusing a sieve.
 6. The heat exchange of claim 1, wherein the firstcorrugation plate and the second corrugation plate are made of analuminum material.
 7. A heat exchanger of a ventilating systemcomprising: heat exchange plates laminated with regular intervals sothat a first air passage through which indoor air being discharged tooutside of a building passes and a second air passage through whichoutdoor air being introduced into the interior of the building passesare sequentially formed; first corrugation plates attached to the firstair passage and obtaining a space to allow the indoor air to passtherethrough; and second corrugation plates attached to the second airpassage and obtaining a space to allow the outdoor air to passtherethrough, wherein the heat exchange plates, the first corrugationplates and the second corrugation plates are made of a paper materialwith fiber intensity and with a plurality of fine holes that are able togenerate a capillary action, moisture of one of the indoor air in thefirst air passage and the outdoor air in the second air passage beingabsorbed by the plurality of fine holes due to the capillary action andbeing directly transferred from the plurality of fine holes to the otherone of the indoor air in the first air passage and the outdoor air inthe second air passage.
 8. The heat exchanger of claim 7, wherein theheat exchange plates, the first corrugation plates and the secondcorrugation plates are made of a Korean paper.
 9. The heat exchanger ofclaim 7, wherein the heat exchange plates, the first corrugation platesand the second corrugation plates contain 60˜70% of holo cellulose,10˜20% of lignin and 5˜10% of lime.
 10. The heat exchanger of claim 8,wherein the Korean paper constituting the heat exchange plates isfabricated with bast fiber of a paper mulberry as a key component. 11.The heat exchanger of claim 10, wherein a process for fabricating theKorean paper comprising the steps of: bundling the paper mulberry,putting the paper mulberry in a container with water, boiling the papermulberry to a degree that a skin of the paper mulberry is easily peeledoff, peeling and drying the skin; soaking the dried skin of the papermulberry in the water, sorting out only a bast fiber portion of thedried skin, putting the bast fiber portion in caustic soda and boilingthe bast fiber portion more than three hours, and wringing the bastfiber portion with a compressor to obtain a moisture-removed bast fiber;and putting the moisture-removed bast fiber in a liquid that has beenprepared by mashing roots of the paper mulberry and pressing them out,and mixing them evenly, and filtering the resulting paper solution byusing a sieve.